2,2-Dimethyl-propionic acid (2S,4aR,5aR,6R,7R,8aR,9S,9aR)-7-(4-acetylamino-2-oxo-2H-pyrimidin-1-yl)-9-amino-2-phenyl-octahydro-furo[2',3':5,6]pyrano[3,2-d][1,3]dioxin-6-yl ester

2,2-Dimethyl-propionic acid (2S,4aR,5aR,6R,7R,8aR,9R,9aR)-9-azido-2-phenyl-7-phenylsulfanyl-octahydro-furo[2',3':5,6]pyrano[3,2-d][1,3]dioxin-6-yl ester

(2S,4aR,6R,7R,8S,8aR)-8-Azido-6-((R)-1-hydroxy-2,2-bis-phenylsulfanyl-ethyl)-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-7-ol

2,2-Dimethyl-propionic acid (2R,3R,3aR,5R,6R,7R,7aR)-2-(4-amino-2-oxo-2H-pyrimidin-1-yl)-7-azido-6-hydroxy-5-hydroxymethyl-hexahydro-furo[3,2-b]pyran-3-yl ester

2,2-Dimethyl-propionic acid (2S,4aR,5aR,6R,7R,8aR,9S,9aR)-7-(4-acetylamino-2-oxo-2H-pyrimidin-1-yl)-9-azido-2-phenyl-octahydro-furo[2',3':5,6]pyrano[3,2-d][1,3]dioxin-6-yl ester